What is the role of MPF in the cell cycle?

MPF, or M-phase promoting factor, plays a crucial role in the regulation of the cell cycle, particularly in the transition from the G2 phase to the M phase, where mitosis occurs. MPF is a complex formed from cyclin and cyclin-dependent kinase (CDK) that activates various proteins necessary for cell division. When the levels of MPF are high, it triggers the events of mitosis, including chromosome condensation, nuclear envelope breakdown, and the reorganization of the mitotic spindle. Thus, the primary function of MPF is to stimulate cell division and ensure that the cell progresses through the cell cycle at the appropriate timing. This makes it integral for the proper replication and division of cells. Other options do not reflect the specific role of MPF in promoting the cell cycle, as they focus on processes that are managed differently within the cell.